CN114182639B - Construction method of a prefabricated side box beam anti-overturning device with a crash wall - Google Patents
Construction method of a prefabricated side box beam anti-overturning device with a crash wall Download PDFInfo
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- CN114182639B CN114182639B CN202111608779.1A CN202111608779A CN114182639B CN 114182639 B CN114182639 B CN 114182639B CN 202111608779 A CN202111608779 A CN 202111608779A CN 114182639 B CN114182639 B CN 114182639B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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Abstract
本发明提供了一种带有防撞墙的预制边箱梁抗倾覆装置的施工方法，用以防止安装过程中边箱梁发生倾覆,所述抗倾覆装置由拉杆系统和型钢组合支架组成，在边箱梁安装过程中，通过设置拉杆系统与型钢组合支架，反向拉住边箱梁，从而克服结构自重产生的倾覆风险。本发明首先在桥墩盖梁上悬挂一型钢组合支架，再将带有防撞墙的边箱梁吊装、临时安装在桥墩支座上；随后安装拉杆系统，通过拉杆系统将边箱梁与型钢组合支架连接固定，使结构自重产生的倾覆力矩通过抗倾覆装置转移至桥墩承受；接着，解除吊装索具、安装下一榀预制边箱梁；待边箱梁间现浇湿接缝施工完成后，相邻边箱梁形成整体，结构可自平衡，拆除边箱梁抗倾覆装置，完成边箱梁的安装。
The present invention provides a construction method of a prefabricated side box girder anti-overturning device with a crash wall, which is used to prevent the side box girder from overturning during the installation process. The anti-overturning device is composed of a tie rod system and a steel composite bracket. During the installation of the side box girder, the tie rod system and the steel composite bracket are set to pull the side box girder in the opposite direction, thereby overcoming the overturning risk caused by the self-weight of the structure. The present invention first hangs a steel composite bracket on the bridge pier cap beam, and then hoists and temporarily installs the side box girder with the crash wall on the bridge pier support; then installs the tie rod system, connects and fixes the side box girder with the steel composite bracket through the tie rod system, so that the overturning moment generated by the self-weight of the structure is transferred to the bridge pier through the anti-overturning device; then, removes the hoisting rigging and installs the next prefabricated side box girder; after the construction of the cast-in-place wet joints between the side box girders is completed, the adjacent side box girders form a whole, the structure can be self-balanced, and the side box girder anti-overturning device is removed to complete the installation of the side box girder.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a construction method of a prefabricated side box girder anti-overturning device with an anti-collision wall.
Background
The side box girder with the anti-collision wall is integrally installed in a hoisting mode after being transported to the site after being prefabricated in a prefabricated field, the side box girder is obviously eccentric due to the existence of the anti-collision wall, and is provided with a transverse slope, and in the installation stage, no matter a simple supporting structure or a simple supporting continuous structure is adopted, before the prefabricated side box girder is not connected to form an integral structure, the side box girder can be subjected to unsteady overturning under the action of dead weight due to mass eccentricity, so temporary measures are needed to be taken to prevent the side box girder from overturning.
Therefore, how to provide a use method of an anti-overturning device capable of preventing the overturning problem of the side box Liang Shiwen in the integral installation process of the prefabricated side box girder with the anti-collision wall has become a technical problem that the building construction industry needs to further perfect and optimize.
Disclosure of Invention
The invention aims to invent a use method of an anti-overturning device for integrally installing a prefabricated side box girder with a collision-proof wall, and solves the problem that the side box girder is unstable and overturned due to eccentric mass of the side box girder in the integral installation process of the prefabricated side box girder with the collision-proof wall.
In order to solve the technical problems, the invention provides the following technical scheme:
a construction method of a prefabricated side box girder anti-overturning device with an anti-collision wall comprises the following steps:
The method comprises the following steps of 1, completing construction of a bridge pier and prefabrication production of an edge box girder with an anti-collision wall in advance, wherein the bridge pier comprises a bridge pier upright post and a bridge pier bent cap, a support cushion stone for supporting the edge box girder and a stop block for limiting lateral displacement of the edge box girder are arranged on the bridge pier bent cap, the bridge pier bent cap is arranged above the bridge pier upright post, and the edge box girder is provided with the anti-collision wall;
Step 2, sleeving a section steel combined support on the outer side of the bridge pier bent cap, wherein the section steel combined support is symmetrically arranged relative to the bridge pier bent cap, permanent supports are arranged on support cushion stones, and temporary supports are arranged on two sides of the support cushion stones;
Step 3, hoisting the side box girder with the anti-collision wall by using large equipment, hoisting the side box girder above the bridge pier capping girder, connecting and fixing the side box girder and the profile steel combined bracket through a pull rod system, thereby completing the installation of an anti-overturning device of the side box girder, and then removing a side box Liang Diao rigging to prepare the installation of the next truss side box girder;
Step 4, hoisting the side box girders one by one in a crossing manner by using large-scale equipment according to the method of the step 3, and connecting and fixing the side box girders and the profile steel combined bracket through a corresponding pull rod system;
And 5, completing construction of cast-in-situ wet joints among the side box girders, forming the adjacent side box girders into an integral structure, and when the concrete age of the side box girders is more than or equal to 7d, self-balancing the structure without maintaining stability of the side box girders by means of an anti-overturning device, and dismantling the anti-overturning device in reverse order with the installation order.
Preferably, in the construction method of the prefabricated side box girder anti-overturning device with the anti-collision wall, in the step 2, the installation method of the profile steel combined bracket is as follows: 1) directly symmetrically placing two upper part longitudinal H-shaped steel on the top of a bridge pier bent cap, 2) installing two upper part transverse connection shaped steel, using bolts to enable the two upper part transverse connection shaped steel to be connected with the two upper part longitudinal H-shaped steel to form a horizontal rectangular frame, 3) installing four vertical connection shaped steel, using bolts to fix the upper ends of the two upper part longitudinal H-shaped steel with the end parts of the upper part longitudinal H-shaped steel respectively, 4) installing two lower part longitudinal H-shaped steel, using bolts to fix the lower ends of the two vertical connection shaped steel, 5) installing two lower part transverse connection shaped steel, using bolts to connect the two lower part longitudinal H-shaped steel with the two upper part transverse connection shaped steel to form a horizontal rectangular frame, and realizing the field installation of the shaped steel combined bracket.
Preferably, in the construction method of the prefabricated side box girder anti-overturning device with the anti-collision wall, the pull rod system comprises a pull rod, a shackle, a steel backing plate and double nuts, a second shackle connecting steel plate is arranged at the lower end of the pull rod, a shackle inserting hole is reserved on the second shackle connecting steel plate, threads are arranged at the top of the pull rod, and a reserved hole for the pull rod to pass through is preset during prefabricated production of the side box girder; after the side box girder is initially hoisted in place, the upper end of the pull rod sequentially passes through a preformed hole on the side box girder and a steel base plate and then is higher than the top surface of the side box girder by a certain height, and a second shackle connecting steel plate on the pull rod is connected with the upper longitudinal H-shaped steel through two shackles; after the side box girder is precisely positioned, the upper end of the pull rod is fixed on the top plate of the side box girder by screwing the double nuts.
Preferably, in the construction method of the prefabricated side box girder anti-overturning device with the anti-collision wall, a first shackle connecting steel plate is arranged at the central line position of the upper longitudinal H-shaped steel top plate, the first shackle connecting steel plate is vertically arranged and corresponds to the lower end of the pull rod, and is fixed through welding, and a shackle inserting hole is reserved in the first shackle connecting steel plate and used for connecting the section steel combined bracket with the pull rod system through a shackle.
Preferably, in the construction method of the prefabricated side box girder anti-overturning device with the anti-collision wall, the top surfaces of two ends of the upper longitudinal H-shaped steel are respectively provided with a first steel plate, the first steel plates are vertically arranged, bolt holes for being connected with upper transverse connection shaped steel bolts are formed in the first steel plates, and the first steel plates are reinforced through first stiffening plates.
Preferably, in the construction method of the prefabricated side box girder anti-overturning device with the anti-collision wall, two end surfaces of the upper transverse connection section steel and the lower transverse connection section steel are respectively provided with a second steel plate, the second steel plates are respectively perpendicular to the upper transverse connection section steel or the lower transverse connection section steel, bolt holes for being in bolt connection with the upper longitudinal H-shaped steel or the lower longitudinal H-shaped steel are formed in the second steel plates, and the second steel plates are reinforced through second stiffening plates.
Preferably, in the construction method of the prefabricated side box girder anti-overturning device with the anti-collision wall, the top side surfaces of two ends of the lower longitudinal H-shaped steel are respectively provided with a third steel plate, bolt holes for connecting the lower transverse connecting section steel bolts are formed in the third steel plates, and the third steel plates are reinforced through third stiffening plates.
Preferably, in the construction method of the prefabricated side box girder anti-overturning device with the anti-collision wall, the pull rod system comprises a pull rod, a shackle, a steel backing plate and double nuts, a second shackle connecting steel plate is arranged at the lower end of the pull rod, a shackle inserting hole is reserved in the second shackle connecting steel plate, the second shackle connecting steel plate on the pull rod is connected with the first shackle connecting steel plate on the upper longitudinal H-shaped steel through the two shackles, a preformed hole for the pull rod to pass through is preset during prefabricated production of the side box girder, the upper end of the pull rod sequentially passes through the preformed hole on the side box girder and the steel backing plate and then is higher than the top surface of the side box girder by a certain height, threads are arranged at the top of the pull rod, and the upper end of the pull rod is fixed on the top plate of the side box girder through screwing the double nuts.
Preferably, in the construction method of the prefabricated side box girder anti-overturning device with the anti-collision wall, a fourth steel plate is arranged at two ends of the vertical connection section steel, bolt holes for being connected with the upper longitudinal H-shaped steel or the lower longitudinal H-shaped steel through bolts are formed in the fourth steel plate, and the fourth steel plate is reinforced through fourth stiffening plates.
Compared with the prior art, the technical scheme disclosed by the invention has the following beneficial effects:
The invention provides a construction method of a prefabricated side box girder anti-overturning device with an anti-collision wall, which comprises the following steps: the method comprises the following steps of 1, completing construction of a bridge pier and prefabrication production of an edge box girder with an anti-collision wall, wherein the bridge pier comprises a bridge pier upright post and a bridge pier bent cap, a support cushion stone for supporting the edge box girder and a stop block for limiting lateral displacement of the edge box girder are arranged on the bridge pier bent cap, the bridge pier bent cap is arranged above the bridge pier upright post, and the edge box girder is provided with the anti-collision wall during installation; step 2, sleeving a section steel combined support on the outer side of the bridge pier bent cap, wherein the section steel combined support is symmetrically arranged relative to the bridge pier bent cap, permanent supports are arranged on support cushion stones, and temporary supports are arranged on two sides of the support cushion stones; step 3, hoisting the side box girder by using large equipment, hoisting the side box girder above the bridge pier capping girder, connecting the side box girder with the profile steel combined bracket through a pull rod system, thereby completing the installation of an anti-overturning device of the side box girder, and then removing a Liang Diao rigging of the side box, and preparing the installation of the next truss side box girder; step 4, hoisting the side box girders by cross truss by using large-scale equipment according to the method of the step 3; and 5, completing the construction of the cast-in-situ wet joints of the side box girders, connecting the adjacent side box girders to form an integral structure, and maintaining the flatness of the side box girder structure without an anti-overturning device, and dismantling the anti-overturning device in reverse order with the installation order. According to the invention, the side box girder is reversely pulled by the pull rod system and the profile steel combined bracket, and the overturning moment caused by the dead weight of the side box girder structure is transmitted to the bridge pier, so that the instability risk of the side box girder structure caused by mass eccentricity is overcome, and the unstable overturning of the side box girder structure in the installation process can be prevented.
Drawings
FIG. 1 is an elevation view of a prefabricated side box girder anti-overturning device with an anti-collision wall during a construction method step 1.
FIG. 2 is a plan view of a prefabricated side box girder anti-overturning device with an anti-collision wall in a construction method step 1.
FIG. 3 is an elevation view of a prefabricated side box girder anti-overturning device with an anti-collision wall during step 2 of the construction method.
FIG. 4 is a plan view of a prefabricated side box girder anti-overturning device with an anti-collision wall during step 2 of the construction method.
FIG. 5is a schematic structural view of a section steel combined bracket.
FIG. 6 is a schematic layout of a sectional steel composite bracket.
FIG. 7 is an elevation view of a prefabricated side box girder anti-overturning device with an anti-collision wall during step 3 of the construction method.
FIG. 8 is a plan view of a prefabricated side box girder anti-overturning device with an anti-collision wall during step 3 of the construction method.
Fig. 9 is an elevation view of a prefabricated side box girder anti-overturning device with an anti-collision wall in a construction method step 4.
FIG. 10 is a plan view of a prefabricated side box girder anti-overturning device with an anti-collision wall at step 4 of the construction method.
FIG. 11 is an elevation view of a prefabricated side box girder anti-overturning device with an anti-collision wall at step 5 of the construction method.
FIG. 12 is a plan view of a prefabricated side box girder anti-overturning device with an anti-collision wall at step 5 of the construction method.
In the figure: 1-pull rod system, 11-pull rod, 12-shackle, 13-steel backing plate, 14-double nut, 15-second shackle connecting steel plate, 2-section steel combined bracket, 21-upper longitudinal H-section steel, 22-upper transverse connecting section steel, 23-lower longitudinal H-section steel, 24-lower transverse connecting section steel, 25-vertical connecting section steel, 26-first shackle connecting steel plate 3-pier capping beam, 4-pier upright, 5-crashproof wall, 6-side box girder, 7-stop, 8-support bolster, 9-permanent support, 10-temporary support, 100-wet joint, 201-first steel plate, 202-second steel plate, 203-third steel plate and 204-fourth steel plate.
Detailed Description
The invention is described in further detail below with reference to the drawings and the specific examples. The technical contents and features of the present invention will be described in detail below with reference to the attached drawings by way of the illustrated embodiments. It should be further noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention. For convenience of description, the "upper" and "lower" described below are consistent with the upper and lower directions of the drawings, but this should not be construed as a limitation of the technical scheme of the present invention.
Referring to fig. 1 to 12, the embodiment discloses a construction method of a prefabricated side box girder anti-overturning device with an anti-collision wall, which comprises the following steps:
The method comprises the following steps of 1, completing construction of a bridge pier and prefabrication production of a side box girder 6 with an anti-collision wall 5, wherein the bridge pier comprises a bridge pier upright post 4 and a bridge pier bent cap 3, a support cushion stone 8 for supporting the side box girder 6 and a stop block 7 for limiting lateral displacement of the side box girder 6 are arranged on the bridge pier bent cap 3, and the bridge pier bent cap 3 is arranged above the bridge pier upright post 4;
Step 2, sleeving a steel composite bracket 2 on the outer side of a bridge pier bent cap 3, wherein the steel composite bracket 2 is symmetrically arranged relative to the bridge pier bent cap 3, permanent supports 9 are arranged on support cushion stones 8, temporary supports 10 are arranged on two sides of the support cushion stones 8, and in the embodiment, the temporary supports 10 adopt steel sand cylinders, and D is the bridge span length;
Step 3, hoisting the side box girder 6 with the anti-collision wall 5 by using large equipment, hoisting the side box girder 6 above the bridge pier capping girder 3, connecting and fixing the side box girder 6 with the profile steel combined support 2 through the pull rod system 1, thereby completing the installation of an anti-overturning device of the side box girder 6, and then, removing a hoisting rigging of the side box girder 6 to prepare the installation of the next truss side box girder;
Step 4, hoisting the side box girders 6 by using large equipment according to the method of step 3, and connecting and fixing the side box girders 6 with the profile steel combined support 2 through the corresponding pull rod system 1;
And 5, completing construction of the cast-in-situ wet joint 100 of the side box girders 6, so that the adjacent side box girders 6 form an integral structure, and when the concrete age of the side box girders is more than or equal to 7d, the integral structure can be self-balanced, and the side box girders are not required to be kept flat by means of an anti-overturning device, and the dismantling sequence is opposite to the installation sequence.
The invention provides a construction method of a prefabricated side box girder anti-overturning device with an anti-collision wall, which comprises the following steps: step 1, finishing construction of a bridge pier and prefabrication production of a side box girder 6 with an anti-collision wall 5, wherein the bridge pier comprises a bridge pier upright post 4 and a bridge pier bent cap 3, a support cushion stone 8 for supporting the side box girder 6 and a stop block 7 for limiting lateral displacement of the side box girder 6 are arranged on the bridge pier bent cap 3, the bridge pier bent cap 3 is arranged above the bridge pier upright post 4, and the side box girder 6 is provided with the anti-collision wall 5 during installation; step 2, sleeving a section steel combined support 2 on the outer side of a bridge pier bent cap 3, wherein the section steel combined support 2 is symmetrically arranged relative to the bridge pier bent cap 3, permanent supports 9 are arranged on support cushion stones 8, and temporary supports 10 are arranged on two sides of the support cushion stones 8; step 3, hoisting the side box girder 6 by using large equipment, hoisting the side box girder 6 above the pier capping girder 3, connecting and fixing the side box girder 6 and the profile steel combined bracket 2 through the pull rod system 1, thereby completing the installation of an anti-overturning device of the side box girder 6, and then, removing a hoisting rigging of the side box girder 6 to prepare the installation of the next side box girder; step 4, hoisting the side box girders 6 by span by using large-scale equipment according to the method of the step 3; and 5, completing construction of the cast-in-situ wet joint 100 of the side box girders 6, so that the adjacent side box girders 6 form an integral structure, and when the concrete age of the integral structure is more than or equal to 7d, the integral structure can be self-balanced, and the anti-overturning device is not required to be maintained to be flat, and is removed, so that the removing sequence is opposite to the mounting sequence. According to the invention, the side box girder 6 is reversely pulled by the pull rod system 1 and the profile steel combined bracket 2, and the overturning moment generated by the dead weight of the side box girder 6 with the anti-collision wall 5 is transmitted to the bridge pier by the pull rod system 1 and the profile steel combined bracket 2, so that the instability risk of the side box girder 6 with the anti-collision wall 5 caused by mass eccentricity is overcome, and the side box girder 6 can be prevented from overturning.
Preferably, in the construction method of the prefabricated side box girder anti-overturning device with the anti-collision wall, in the step 2, the installation method of the profile steel combined bracket 2 is as follows: 1) two upper longitudinal H-shaped steel 21 are directly and symmetrically placed on the top of a bridge pier bent cap, 2) two upper transverse connection shaped steel 22 are installed, the two upper transverse connection shaped steel and the two upper longitudinal H-shaped steel 21 are connected by using bolts to form a horizontal rectangular frame, 3) four vertical connection shaped steel 25 are installed, the upper ends of the four vertical connection shaped steel 25 are respectively fixed with the end parts of the upper longitudinal H-shaped steel 21 by using bolts, 4) two lower longitudinal H-shaped steel 23 are installed, the two lower transverse connection shaped steel 24 are fixed with the lower ends of the vertical connection shaped steel 25 by using bolts, 5) the two lower transverse connection shaped steel 24 are installed, and the two lower longitudinal H-shaped steel 23 are connected by using bolts to form a horizontal rectangular frame, so that the field quick installation of the shaped steel combined support 2 is realized. And adopt shaped steel sectional shelf-unit 2, can connect 4 pull rod systems simultaneously, prevent the toppling of four pin limit case roof beams, not only practice thrift the cost, install convenient high efficiency, can improve the stability of antidumping moreover.
Preferably, in the construction method of the prefabricated side box girder anti-overturning device with the anti-collision wall, the pull rod system 1 comprises a pull rod 11, a shackle 12, a steel backing plate 13 and a double nut 14, a second shackle connecting steel plate 15 is arranged at the lower end of the pull rod 11, a shackle inserting hole is reserved on the second shackle connecting steel plate 15, threads are arranged at the top of the pull rod 11, and a reserved hole for the pull rod 11 to pass through is preset during prefabricated production of the side box girder 6; after the side box girder 6 is initially hoisted in place, the upper end of the pull rod 11 sequentially passes through a preformed hole on the side box girder 6 and a steel base plate 13 and then is higher than the top surface of the side box girder 6 by a certain height, and a second shackle connecting steel plate 15 on the pull rod 11 is connected with the upper longitudinal H-shaped steel 21 through two shackles 12; after the side box girder 6 is precisely positioned, the upper end of the pull rod 11 is fixed on the top plate of the side box girder 6 by tightening the double nuts 14. By adopting the pull rod system 1 with the structure, the side box beam 6 and the profile steel combined bracket 2 can be quickly and stably connected.
Preferably, in the construction method of the prefabricated side box girder anti-overturning device with the anti-collision wall, a first shackle connecting steel plate 26 is vertically arranged on the top plate of the upper longitudinal H-shaped steel 21 corresponding to the horizontal projection position of the pull rod system 1, and a shackle inserting hole is reserved in the first shackle connecting steel plate 26 and used for connecting the profile steel combined bracket 2 with the pull rod system 1 through the shackle 12, so that quick and stable connection between the profile steel combined bracket 2 and the pull rod system 1 can be realized.
Preferably, in order to realize the quick and effective connection between the upper longitudinal H-section steel 21 and the upper transverse connection section steel 22, in the construction method of the prefabricated side box girder anti-overturning device with the anti-collision wall, the top plates at two ends of the upper longitudinal H-section steel 21 are respectively provided with a first steel plate 201, the first steel plates 201 are vertically arranged, the first steel plates are welded and fixed with the upper longitudinal H-section steel 21, bolt holes for being connected with the upper transverse connection section steel bolts are formed in the first steel plates 201, and the first steel plates 201 are reinforced by first stiffening plates.
Preferably, in order to achieve the rapid and effective connection between the upper longitudinal H-section steel 21 and the upper transverse connecting section steel 22 and the rapid and effective connection between the lower longitudinal H-section steel 23 and the lower transverse connecting section steel 24, in the construction method of the prefabricated side box girder anti-overturning device with the anti-collision wall, two end surfaces of the upper transverse connecting section steel 22 and the lower transverse connecting section steel 24 are respectively provided with a second steel plate 202, the second steel plates 202 are respectively perpendicular to the upper transverse connecting section steel 22 or the lower transverse connecting section steel 24, the second steel plates 202 are reinforced by a plurality of second vertical stiffening plates, and bolt holes for being in bolted connection with the upper longitudinal H-section steel 21 or the lower longitudinal H-section steel 23 are formed in the second steel plates 202, and the thickness of the second steel plates is generally 10mm.
Preferably, in the construction method of the prefabricated side box girder anti-overturning device with the anti-collision wall, the pull rod system 1 comprises a pull rod 11, a shackle 12, a steel backing plate 13 and a double nut 14, a second shackle connecting steel plate 15 is arranged at the lower end of the pull rod 11, a shackle inserting hole is reserved on the second shackle connecting steel plate 15, the second shackle connecting steel plate 15 on the pull rod 11 is connected with a first shackle connecting steel plate 26 on the upper longitudinal H-shaped steel 21 through the two shackles 12, a preformed hole for the pull rod 11 to pass through is preset during the prefabricated production of the side box girder 6, the upper end of the pull rod 11 sequentially passes through the preformed hole on the side box girder 6 and the steel backing plate 13 and then is higher than the top surface of the side box girder 6 by a certain height, threads are arranged at the top of the pull rod 11, and the upper end of the pull rod 11 is fixed on the top plate of the side box girder 6 through screwing the double nut 14.
Preferably, in order to achieve the rapid and effective connection between the lower longitudinal H-section steel 23 and the lower transverse connection section steel 24, in the construction method of the prefabricated side box girder anti-overturning device with the anti-collision wall, a third steel plate 203 is respectively arranged on the top side surfaces of two ends of the lower longitudinal H-section steel 23, bolt holes for bolting the lower transverse connection section steel 24 are formed in the third steel plate 203, and the third steel plate is reinforced by a third stiffening plate.
Preferably, in order to achieve the rapid and effective connection between the vertical connection section steel 25 and the upper longitudinal H-shaped steel 21 and the lower longitudinal H-shaped steel 23, in the construction method of the prefabricated side box girder anti-overturning device with the anti-collision wall, the two ends of the vertical connection section steel 25 are provided with fourth steel plates 204, bolt holes for bolting with the upper longitudinal H-shaped steel 21 or the lower longitudinal H-shaped steel 23 are formed in the fourth steel plates 204, and the fourth steel plates 204 are reinforced by fourth stiffening plates.
The above description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, and any alterations and modifications made by those skilled in the art based on the above disclosure shall fall within the scope of the appended claims.
Claims (7)
1. The construction method of the prefabricated side box girder anti-overturning device with the anti-collision wall is characterized by comprising the following steps of:
The method comprises the following steps of 1, completing construction of a bridge pier and prefabrication production of an edge box girder with an anti-collision wall in advance, wherein the bridge pier comprises a bridge pier upright post and a bridge pier bent cap, a support cushion stone for supporting the edge box girder and a stop block for limiting lateral displacement of the edge box girder are arranged on the bridge pier bent cap, the bridge pier bent cap is arranged above the bridge pier upright post, and the edge box girder is provided with the anti-collision wall;
Step 2, sleeving a section steel combined support on the outer side of the bridge pier bent cap, wherein the section steel combined support is symmetrically arranged relative to the bridge pier bent cap, permanent supports are arranged on support cushion stones, and temporary supports are arranged on two sides of the support cushion stones;
Step 3, hoisting the side box girder with the anti-collision wall by using large equipment, hoisting the side box girder above the bridge pier capping girder, connecting and fixing the side box girder and the profile steel combined bracket through a pull rod system, thereby completing the installation of an anti-overturning device of the side box girder, and then removing a side box Liang Diao rigging to prepare the installation of the next truss side box girder;
Step 4, hoisting the side box girders one by one in a crossing manner by using large-scale equipment according to the method of the step 3, and connecting and fixing the side box girders and the profile steel combined bracket through a corresponding pull rod system;
step 5, completing construction of cast-in-situ wet joints among the side box girders, enabling the adjacent side box girders to form an integral structure, and when the concrete age of the side box girders is more than or equal to 7d, enabling the structure to be self-balanced, maintaining stability of the side box girders without using an anti-overturning device, and dismantling the anti-overturning device in reverse order with the installation order;
In the step 2, the installation method of the profile steel combined bracket is as follows: 1) directly and symmetrically placing two upper longitudinal H-shaped steel on the top of a bridge pier bent cap, 2) installing two upper transverse connection shaped steel, using bolts to enable the two upper transverse connection shaped steel to be connected with the two upper longitudinal H-shaped steel to form a horizontal rectangular frame, 3) installing four vertical connection shaped steel, using bolts to fix the upper ends of the two upper longitudinal H-shaped steel with the end parts of the upper longitudinal H-shaped steel respectively, 4) installing two lower longitudinal H-shaped steel, using bolts to fix the two lower longitudinal H-shaped steel with the lower ends of the vertical connection shaped steel, 5) installing two lower transverse connection shaped steel, using bolts to enable the two lower transverse connection shaped steel to be connected with the two lower longitudinal H-shaped steel to form a horizontal rectangular frame, and realizing field installation of the shaped steel combined bracket;
The pull rod system comprises a pull rod, a shackle, a steel backing plate and double nuts, wherein a second shackle connecting steel plate is arranged at the lower end of the pull rod, a shackle inserting hole is reserved on the second shackle connecting steel plate, threads are arranged at the top of the pull rod, and a reserved hole for the pull rod to pass through is reserved in prefabrication production of the side box girder; after the side box girder is initially hoisted in place, the upper end of the pull rod sequentially passes through a preformed hole on the side box girder and a steel base plate and then is higher than the top surface of the side box girder by a certain height, and a second shackle connecting steel plate on the pull rod is connected with the upper longitudinal H-shaped steel through two shackles; after the side box girder is precisely positioned, the upper end of the pull rod is fixed on the top plate of the side box girder by screwing the double nuts.
2. The construction method of the prefabricated side box girder anti-overturning device with the anti-collision wall according to claim 1, wherein a first shackle connecting steel plate is arranged at the central line position of the upper longitudinal H-shaped steel top plate, the first shackle connecting steel plate is vertically arranged and corresponds to the lower end of the pull rod, and is fixed through welding, and a shackle inserting hole is reserved in the first shackle connecting steel plate for connecting the shaped steel combined bracket with the pull rod system through a shackle.
3. The construction method of the prefabricated side box girder anti-overturning device with the anti-collision wall according to claim 1, wherein first steel plates are respectively arranged on the top surfaces of two ends of the upper longitudinal H-shaped steel, the first steel plates are vertically arranged, bolt holes for being connected with upper transverse connection shaped steel bolts are formed in the first steel plates, and the first steel plates are reinforced through first stiffening plates.
4. The construction method of the precast side box girder anti-overturning device with the anti-collision wall according to claim 1, wherein two end surfaces of the upper transverse connection section steel and the lower transverse connection section steel are respectively provided with a second steel plate, the second steel plates are respectively perpendicular to the upper transverse connection section steel or the lower transverse connection section steel, bolt holes for being connected with upper longitudinal H-shaped steel or lower longitudinal H-shaped steel through bolts are formed in the second steel plates, and the second steel plates are reinforced through second stiffening plates.
5. The construction method of the precast side box girder anti-overturning device with the anti-collision wall according to claim 1, wherein a third steel plate is respectively arranged on the top side surfaces of two ends of the lower longitudinal H-shaped steel, bolt holes for bolting the lower transverse connecting section steel are formed in the third steel plate, and the third steel plate is reinforced by a third stiffening plate.
6. The construction method of the prefabricated side box girder anti-overturning device with the anti-collision wall according to claim 1, wherein the pull rod system comprises a pull rod, shackles, a steel base plate and double nuts, a second shackles connecting steel plate is arranged at the lower end of the pull rod, a shackles inserting hole is reserved in the second shackles connecting steel plate, the second shackles connecting steel plate on the pull rod is connected with the first shackles connecting steel plate on the upper longitudinal H-shaped steel through the two shackles, a preformed hole for the pull rod to pass through is preset in the prefabricated production of the side box girder, the upper end of the pull rod sequentially passes through the preformed hole on the side box girder and the steel base plate and then is higher than the top surface of the side box girder by a certain height, threads are arranged at the top of the pull rod, and the upper end of the pull rod is fixed on the top plate of the side box girder by screwing the double nuts.
7. The construction method of the prefabricated side box girder anti-overturning device with the anti-collision wall according to claim 1, wherein a fourth steel plate is arranged at two ends of the vertical connection section steel, bolt holes for being connected with the upper longitudinal H-shaped steel or the lower longitudinal H-shaped steel are formed in the fourth steel plate, and the fourth steel plate is reinforced through a fourth stiffening plate.
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|---|---|---|---|---|
| CN104514202A (en) * | 2014-12-23 | 2015-04-15 | 浙江工业大学 | Single-column pier beam bridge anti-overturning reinforcing method |
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| KR100651663B1 (en) * | 2005-09-06 | 2006-12-01 | 선영선 | Lateral vibration reduction of truss bridge and fall prevention reinforcement device |
| CN203096599U (en) * | 2013-03-01 | 2013-07-31 | 河海大学 | Tension-compression rod type anti-toppling device of steel-and-concrete-combination beam bridge |
| KR102206783B1 (en) * | 2020-04-10 | 2021-01-25 | (주)인터컨스텍 | Temporary Fixing System for Prestressed Concrete Spliced Girder Bridge and Construction method using thereof |
| CN212561119U (en) * | 2020-06-10 | 2021-02-19 | 西安公路研究院 | A reinforced single-column pier box girder |
| CN113005904A (en) * | 2021-02-09 | 2021-06-22 | 浙江交工集团股份有限公司 | Synchronous integral hoisting construction process for precast beam top anti-collision wall |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104514202A (en) * | 2014-12-23 | 2015-04-15 | 浙江工业大学 | Single-column pier beam bridge anti-overturning reinforcing method |
| CN112239993A (en) * | 2020-10-19 | 2021-01-19 | 上海市政工程设计研究总院（集团）有限公司 | Bridge anti-overturning device adaptive to multidirectional displacement and construction method thereof |
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